Facts It Is Advisable To Be Informed On Aerosol Fire Extinguishing
Facts It Is Advisable To Be Informed On Aerosol Fire Extinguishing
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What is Aerosol fireplace extinguishing
Exactly what is aerosol hearth extinguisher? Aerosol fire extinguishing technological know-how is a completely new style of fire extinguishing technological know-how formulated on the basis of military services pyrotechnics.
The primary era of aerosol fire extinguishing technology was born in our country, generally known as smoke fire extinguishing technological know-how, which began from the early nineteen sixties. It had been done by scientific researchers from the Tianjin Hearth Study Institute of Community Protection, who independently produced an automated smoke hearth extinguishing procedure, which is principally utilized to extinguish fires in Class A, B, and C liquid storage tanks.
Inside the early nineteen eighties, With all the emergence of environmental defense issues of “halon fire extinguishing agent”, obtaining solutions to halon turned a very important research subject.
At the end of the 1980s, Russian scientists initial succeeded in exploring aerosol hearth extinguishing know-how which can extinguish fires in a submerged manner, which opened up a new way for halon substitution research. Subsequently, aerosol fireplace extinguishing technological know-how has captivated the attention with the international community, and countries like China, The us, Australia, Malaysia along with other nations have also begun study on new aerosol fire extinguishing systems.
Most of the time, aerosol is often a steady state system formed through the dispersion of good solid or liquid particles in the gas. Professionally, it refers to the colloidal system that takes advantage of fuel (usually air) as being the dispersion medium and stable or liquid particles since the dispersant.Typical aerosols in nature—clouds, smoke, fog, and many others.The dimensions from the particles in aerosols is generally from the purchase of ten-5 to ten-1μm, which has fuel fluidity and may diffuse around road blocks.
The medicament inside the aerosol fireplace suppression technique unit is solid, plus the element emitted via the medicament throughout the oxidation-reduction reaction is aerosol. The primary generation of aerosol hearth extinguishing technologies-smoke fireplace extinguishing engineering.
K-style aerosol hearth extinguisher, also known as potassium salt fire extinguishing know-how, is the next phase of the development of aerosol hearth extinguishing technological innovation, which commenced in the previous Soviet Union in the mid-sixties. Our country started out late On this regard, beginning from the early 1990s.
In this kind of aerosol making agent, potassium nitrate is mainly employed as the leading oxidant. Its sprays have higher fireplace extinguishing performance, but since they have a great deal of potassium ions, Quick to soak up humidity, forming a yellow and sticky strong alkaline conductive liquid film, this substance is very damaging to electronic gear, so K-sort aerosol automatic hearth extinguishing product cannot be used in electronic gear, precision devices and cultural relics Archive spot. At the moment, the use out there is progressively reducing.
The third-generation aerosol (S variety) is principally crafted from strontium salt as the leading oxidant. Compared with the 2nd-technology potassium salt (K-form) aerosol, strontium ions usually do not take up humidity, will not sort a conductive solution, and will never lead to damage to electrical tools. In 2001, China Cellular Communications Corporation selected the strontium salt aerosol (S-kind aerosol automatic fireplace extinguishing product) produced by the organization following rigid inspection and verification to protect its interaction base stations together with other destinations equipped with sophisticated Digital gear.
At this time, strontium salt aerosol merchandise happen to be used in 1000s of engineering projects, along with the third-technology aerosol is becoming more and more approved by end users
Aerosol fire extinguisher software variety
a. Electrical fireplace
Communication home, communication foundation station, electronic Laptop room, and so forth.;
Electrical fires in places that contains precision devices and gear, for instance energy distribution rooms, generator rooms, cable interlayers, cable wells, cable trenches, and many others.
b. Solid surface area fireplace
Area fire of combustible reliable materials in areas wherever combustible solid resources are used or saved.
c. Liquid fireplace
Liquid fires in areas the place diesel oil is manufactured, employed or saved (besides -35 diesel), major oil, transformer oil, animal and vegetable oil along with other flammable liquids of Group C; Before extinguishing a gas hearth, the fuel resource could be Slice off.
Aerosol fireplace suppression method application .
d. The S-variety aerosol fireplace extinguishing device cannot be used to place out the next fires
1. Substances that could be oxidized with out air, including nitrocellulose, gunpowder, and so forth.; Lively metals, which include potassium, sodium, magnesium, titanium, etc.; compounds that may decompose by by themselves, for instance sure peroxides, hydrazine, etcetera. Metallic hydrides, such as potassium fluoride, sodium hydride, and so forth. Pure substances, for example phosphorus. Solid oxidants, for instance nitrogen oxide, fluorine, etcetera.
2. Deep fireplace of combustible stable elements.
3. Hearth in crowded spots, for example theaters, auditoriums, and many others.
4. Hearth in areas with explosion hazard, for example workshops with explosive dust.
5. Ultra-clear surroundings, including pharmaceutical workshops, chip processing locations, healthcare rooms, etc.
Aerosol fireplace extinguishing Doing work theory
The four features of combustion: combustibles, oxidizer, temperature and uninhibited chain response. The fireplace extinguishing mechanism of fireplace extinguishing gasoline would be to eradicate one particular or various on the four elements of combustion.
The solid fireplace extinguishing agent in the S-style aerosol fireplace extinguishing system is started out by electrical energy, and it undergoes redox response to form numerous agglomerated fire extinguishing aerosols, and its composition is mainly N2, a little level of CO2, and metallic salt stable particles.
Aerosol fire extinguishing system is as follows
Mechanism of endothermic cooling and hearth extinguishing
Metallic salt particles take in a great deal of heat at high temperatures, and undergo Actual physical endothermic processes which include thermal melting and gasification. The flame temperature is reduced after which you can radiated on the combustible combustion area for gasification of combustible molecules and vaporized combustible molecules. The heat of pyrolysis of combustion molecules into no cost radicals will reduce, as well as combustion reaction pace will probably be suppressed to a particular extent.
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